Journal of the American Veterinary Medical Association · 2023
Comparison of caregivers' assessments of clinical outcome in dogs with idiopathic epilepsy administered levetiracetam, zonisamide, or phenobarbital monotherapy.
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Gristina Bryanna R, Waldron Rennie J, Nettifee Julie A, Muñana Karen R
Аннотация
OBJECTIVE: To investigate caregivers' assessments of outcome in dogs with idiopathic epilepsy (IE) administered levetiracetam (LEV), zonisamide (ZNS), or phenobarbital (PB) monotherapy.
ANIMALS: 100 dogs with IE administered LEV (n = 34), ZNS (31), or PB (35) monotherapy between January 1, 2003, and February 6, 2019, and survey responses from their caregivers.
PROCEDURES: Information on duration of therapy, adverse effects (AEs), and outcome was obtained from medical record review and caregiver questionnaire.
RESULTS: A significant improvement in mean quality of life score was reported during monotherapy (7.7; SD, 2.14) compared to before treatment (6.25; SD, 2.63; P < .0001), with no difference identified between monotherapy groups. Compared to ZNS monotherapy, dogs prescribed PB monotherapy had a significantly younger median age at seizure onset (2.6 vs 4.3 years; P = .024). A significant relationship was identified between the occurrence of reported AEs and monotherapy group, with a higher prevalence in the PB group (77% [27/35]) and a lower prevalence in the ZNS group (39% [12/31]; P = .0066). Treatment failure rates for PB, LEV, and ZNS monotherapy were 51%, 35%, and 45%, respectively, with failure attributed most commonly to inadequate seizure control. No significant difference was identified between groups with respect to rate of or time to failure.
CLINICAL RELEVANCE: Most caregivers reported a favorable outcome with administration of LEV, ZNS, or PB monotherapy to dogs with IE. Phenobarbital is associated with the highest prevalence of AEs but no difference in quality of life score. Prospective controlled studies are needed to further compare the efficacy and safety of these monotherapies in dogs with IE.
ANIMALS: 100 dogs with IE administered LEV (n = 34), ZNS (31), or PB (35) monotherapy between January 1, 2003, and February 6, 2019, and survey responses from their caregivers.
PROCEDURES: Information on duration of therapy, adverse effects (AEs), and outcome was obtained from medical record review and caregiver questionnaire.
RESULTS: A significant improvement in mean quality of life score was reported during monotherapy (7.7; SD, 2.14) compared to before treatment (6.25; SD, 2.63; P < .0001), with no difference identified between monotherapy groups. Compared to ZNS monotherapy, dogs prescribed PB monotherapy had a significantly younger median age at seizure onset (2.6 vs 4.3 years; P = .024). A significant relationship was identified between the occurrence of reported AEs and monotherapy group, with a higher prevalence in the PB group (77% [27/35]) and a lower prevalence in the ZNS group (39% [12/31]; P = .0066). Treatment failure rates for PB, LEV, and ZNS monotherapy were 51%, 35%, and 45%, respectively, with failure attributed most commonly to inadequate seizure control. No significant difference was identified between groups with respect to rate of or time to failure.
CLINICAL RELEVANCE: Most caregivers reported a favorable outcome with administration of LEV, ZNS, or PB monotherapy to dogs with IE. Phenobarbital is associated with the highest prevalence of AEs but no difference in quality of life score. Prospective controlled studies are needed to further compare the efficacy and safety of these monotherapies in dogs with IE.